IP Library Granted Patent US 12,480,740
Granted Patent B2
US 12,480,740 · App. 17/108,384 · Granted Nov 25, 2025

Two-part folding trigger for a folding firearm

Inventors: Zachary Freeman (Broomfield, CO); Nicholas Kielsmeier (Denver, CO)
Assignee: Magpul Industries Corp.
F41C23/04F41A3/66F41A3/72F41A11/04F41A35/06F41C9/02F41C23/12F41C33/08
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Quick Facts
Patent No.
US 12,480,740
App. No.
17/108,384
Granted
Nov 25, 2025
Kind
B2
Abstract

The present disclosure describes a foldable firearm that collapses into a folded state under spring pressure. The foldable firearm may include a foldable grip assembly. The foldable grip assembly may include a foldable pistol grip, a foldable trigger assembly, a folding bar, and a foldable hand stop. The foldable grip assembly may fold into the housing of the foldable firearm. The foldable grip assembly may include a two-part folding trigger a part of which folds forward when the platform folds, to compress the vertical profile of the platform and also to present an inherent safety in the stowed configuration. The foldable firearm can also include a manual safety accessible from outside a housing of the platform that renders a trigger bar incapable of movement and release of the striking mechanism when the safety is engaged.

Claims (30)

1 . A folding firearm comprising:

a frame comprising a trigger and a fixed rear part extending downward from an axis parallel to a slide direction of a slide of the folding firearm;

a foldable grip that rotatably separates from the fixed rear part along a breakaway interface when the folding firearm is folded, and is configured to fold around a first pivot axis that is forward of a front surface of the foldable grip when in a deployed state, the foldable grip further having a grip trigger contact region proximal a top of the front surface;

a foldable trigger guard comprising a front leg, a bottom leg, and a folded and a deployed state, the front leg and the bottom leg being oblique to each other in the deployed state, the bottom leg rotatably coupling to the foldable grip via a second pivot axis, the front leg and the bottom leg rotatably coupling via a third pivot axis; and

the trigger configured to fold forward and split into a rear part and a forward part when the foldable grip biases the trigger forward, the trigger rotating about a fourth pivot axis.

2 . The folding firearm of claim 1 , wherein the first pivot axis is forward of the fourth pivot axis.

3 . The folding firearm of claim 2 , wherein the first pivot axis is arranged higher than the fourth pivot axis.

4 . The folding firearm of claim 1 , wherein the first pivot axis and the fourth pivot axis are the same.

5 . The folding firearm of claim 1 , further comprising a housing coupled to the frame.

6 . The folding firearm of claim 5 , wherein the front leg folds up into a channel in the housing and the bottom leg folds up below the front leg and below the housing.

7 . The folding firearm of claim 5 , wherein the front leg pivots about pins that extend outward from the front leg and wherein the pins are arranged through at least a part of the housing.

8 . The folding firearm of claim 5 , further comprising pins that extend outward from the front leg and into the housing and are aligned with a fifth pivot axis through the housing.

9 . The folding firearm of claim 1 , wherein the rear part of the trigger is coupled to a trigger bar.

10 . The folding firearm of claim 9 , wherein at least a portion of the trigger decouples from the trigger bar when the folding firearm is folded.

11 . The folding firearm of claim 1 , wherein the foldable grip comprises a locking arm that extends substantially upward from a back portion of the foldable grip and locks into the fixed rear part of the frame when the folding firearm is in the deployed state.

12 . The folding firearm of claim 1 , wherein the foldable grip comprises two extensions between a body of the foldable grip and the first pivot axis, wherein the frame includes recesses on outer sides of the frame shaped to allow rotation of the two extensions and wherein a first width between outer faces of the two extensions is substantially equal to a second width of the frame proximal the two extensions.

13 . A folding firearm comprising:

a frame comprising a trigger and a fixed rear part extending downward from an axis parallel to a slide direction of a slide of the folding firearm;

a foldable grip that rotatably separates from the fixed rear part along a breakaway interface when the folding firearm is folded, and is configured to fold around a first pivot axis that is forward of a front surface of the foldable grip when in a deployed state;

a foldable trigger guard comprising a front leg, a bottom leg, and a folded and a deployed state, the front leg and the bottom leg being oblique to each other in the deployed state, the bottom leg rotatably coupling to the foldable grip via a second pivot axis, the front leg and the bottom leg rotatably coupling via a third pivot axis; and

the trigger configured to fold forward and split into a rear part and a forward part when the foldable grip biases the trigger forward, the trigger rotating about the first pivot axis.

14 . The folding firearm of claim 13 , further comprising a housing coupled to the frame, and wherein the front leg folds up into a channel in a bottom of the housing and the bottom leg folds up below the front leg and below the housing.

15 . The folding firearm of claim 14 , wherein the front leg pivots about pins that extend outward from the front leg and wherein the pins are arranged through at least a part of the housing.

16 . A folding firearm comprising:

a frame comprising a trigger and a fixed rear part extending downward from an axis parallel to a slide direction of a slide of the folding firearm;

a foldable grip that rotatably separates from the fixed rear part along a breakaway interface when the folding firearm is folded, and is configured to fold around a first pivot axis that is forward of a front surface of the foldable grip when in a deployed state;

a foldable trigger guard comprising a front leg, a bottom leg, and a folded and a deployed state, the front leg and the bottom leg being oblique to each other in the deployed state, the bottom leg rotatably coupling to the foldable grip via a second pivot axis, the front leg and the bottom leg rotatably coupling via a third pivot axis, wherein the front leg pivots about pins that extend outward from the front leg and wherein the pins are arranged through at least a part of the frame; and

the trigger configured to fold forward and separate from a trigger bar when the foldable grip biases the trigger forward, the trigger rotating about a fourth pivot axis.

17 . The folding firearm of claim 16 , wherein the first and the fourth pivot axes are the same.

18 . The folding firearm of claim 16 , further comprising a housing coupled to the frame.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 2, 2021
From: FREEMAN, ZACHARY; KIELSMEIER, NICHOLAS
To: MAGPUL INDUSTRIES CORP.
Reel/Frame 055805/0315 →
Continuity (6)
Continuation In Part 16799962 · Feb 25, 2020
Continuation 16584133 · Sep 26, 2019
Division 16228600 · Dec 20, 2018
Provisional Application 63033370 · Jun 2, 2020
Provisional Application 62610731 · Dec 27, 2017
Related Publication 20210254927A1 · Aug 19, 2021
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NRA Museum, “Belgian Folding Trigger”, Known to exist as early as Apr. 30, 2020, pp. 1. [cited by applicant]
Kirkpatrick, John, “Glock Manual Safety Kit by Cominolli Custom”, Mar. 17, 2011, Downloaded on Jul. 30, 2020 from https://www.usacarry.com/glock-manual-safety-kit-by-cominolli-custom/, pp. 6. [cited by applicant]
Nicholas C., “Full Conceals Folding Glock Akin to Magpuls FMG9”, Jul. 28, 2017, pp. 7, Publisher: Retrieved from https://www.thefirearmblog.com/blog/2017/07/28/full-conceals-folding-glock-akin-magpuls-fmg9/. [cited by applicant]
Pete, “Uncovered: GEN5 Glock 22 With Manual Safety in Sao Paulo Brazil”, Jan. 19, 2018, “Downloaded on Jul. 30, 2020 from https://www.thefirearmblog.com/blog/2018/01/19/gen5-glock-22-sao-paulo/”, pp. 33. [cited by applicant]
Nicholas C, “A Closer Look at the Glock Thumb Safety”, Nov. 2, 2018, “Downloaded on Jul. 30, 2020 from https://www.thefirearmblog.com/blog/2018/11/02/a-closer-look-at-the-glock-thumb-safety/”, pp. 34. [cited by applicant]
White, Phil, “Breaking: New Glock 19 MHS 9MM and Glock 23 MHS .40 S and W”, Jun. 27, 2017 “Downloaded on Jul. 30, 2020 from https://www.thefirearmblog.com/blog/2017/06/27/glock-19-mhs-23-mhs-photos/”, pp. 23. [cited by applicant]
Full Conceal, “M3D-AL Frame (Glock 19 GEN 3/4/5 Compatible)”, Known to exist as early as Apr. 23, 2020, pp. 2, Publisher: Retrieved from https://www.fullconceal.com. [cited by applicant]
Full Conceal, “M3D Handgun (Based on Glock 19 GEN 4)”, “Known to exist as early as Apr. 23, 2020”, pp. 1, Publisher: Downloaded from https://www.fullconceal.com. [cited by applicant]
Full Conceal, “M3D-S6 Bare Frame”, “Known to exist as early as Apr. 30, 2020”, Publisher: Retrieved from https://www.fullconceal.com. [cited by applicant]
Grab a Gun, “Full Conceal Viper With M3D Folding Glock Pistol 9MM 21RDS”, “Known to exist as early as Apr. 30, 2020”, pp. 11, Publisher: https://grabagun.com/fc-viper-m3d-glock-19-9mm-21rd-blk.html. [cited by applicant]
Full Conceal, “M3S Handgun (Based On Glock 43)”, “Known to exist as early as Apr. 23, 2020”, pp. 2, Publisher: Retrieved from https://www.fullconceal.com. [cited by applicant]
Wikipedia, “Magpul FMG-9”, Known to exist as early as Dec. 12, 2017, pp. 1, Publisher: Retrieved from https://en.wikipedia.org/wiki/Magpul_FMG-9. [cited by applicant]
Premier Arms, “Glock Safety Kits”, Known to exist as early as Jul. 30, 2020, pp. 7, Publisher: Downloaded on Jul. 30, 2020 from premierarms.com/services/glock_safety_kits. [cited by applicant]
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Tarnhelm Supply Co., Inc., “Glock Manual Safety”, Known to exist as early as Jul. 30, 2020, pp. 2, Publisher: Downloaded on Jul. 30, 2020 from www.tarnhelm.com/GlockSafety.html. [cited by applicant]
Tau Development Group, “Striker Control Device”, Known to exist as early as Apr. 20, 2020 , pp. 1, Publisher: Retrieved from https://taudevgroup.myshopify.com/products/striker-control-device. [cited by applicant]
Ten-Ring Precision, Inc., “Glock Pistol Work”, Known to exist as early as Jul. 30, 2020, pp. 6, Publisher: Downloaded on Jul. 30, 2020 from https://tenring.com/glock-pistol-work-2/. [cited by applicant]
Clipdraw, “Trigger Guard”, Known to exist as early as Apr. 20, 2020, pp. 3, Publisher: Retrieved from https://www.clipdraw.com/glock-trigger-safety-products/. [cited by applicant]
Final Office Action received for U.S. Appl. No. 18/653,250 dated Nov. 8, 2024, 7 pages. [cited by applicant]
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“Colt SCW: A Trailblazer for the Seals”, State of Guns, 3 pages, <https://stateofguns.com/colt-scw-557/>, Known as early as Jun. 9, 2021. [cited by applicant]
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“Heckler & Koch G36”, Wikipedia, 5 pages, online available at <https://en.wikipedia.org/wiki/Heckler_%26_Koch_G36>, Known as early as Jun. 9, 2021. [cited by applicant]
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“Lifecard”, Trailblazer Firearms, 2 pages, online avilable at <https://trailblazerfirearms.com/lifecard-gun/>, Known as ? Arty as Jun. 9, 2021. [cited by applicant]
“M3MOD Shell”, Full Conceal Inc., 2 pages, online available at <https://web.archive.org/web/20200222195416/https://www.fullconceal.com/product-page/m3mod-shell/>, Known as early as Feb. 22, 2020. [cited by applicant]
“MP 40”, Wikipedia, 3 pages, online avilable at <https://en.wikipedia.org/wiki/MP_40>, Known as early as Jun. 9, 2021. [cited by applicant]
“NAA-22LR-HG”, North American Arms, 1 page, online available at <https://northamericanarms.com/shop/firearms/riaa-221r-hg/>, Known as early as Jun. 9, 2021. [cited by applicant]
“PP-90”, Wikipedia, 1 page, online available at <https://en.wikipedia.org/wiki/PP-90>, Known as early as Jun. 9, 2021. [cited by applicant]
“SU16TM Series”, Keltec Weapons, 3 pages, online available at <https://www.keltecweapons.com/firearms/rifles/su16/>, Known as early as Jun. 9, 2021. [cited by applicant]
“SUB2000TM”, Keltec Weapons, 3 pages, online available at <https://www.keltecweapons.com/firearms/rifles/sub2000/ >, Known as early as Jun. 9, 2021. [cited by applicant]
“UC-9 Folding Submachine Gun”, Midwest Tactical Inc., atfmachinegun.com, 2 pages, online available at <https://www.attmachinegun.com/ blog/uc9>, known as early as May 16, 2019. [cited by applicant]
Communication pursuant to Rule 164(1) EPC received for European Patent Application Serial No. 18895647.8 dated Mar. 22, 2021, 12 pages. [cited by applicant]
Eger, Chris,“Ruger AC556: The Totally Legal, Totally Select Fire Mini 14 (Video)”, guns.com, 4 pages, online available at <https://www.guns.com/news/2014/03/10/ruger-ac556-totally-legal-totally-full-auto-mini-14-video>,… [cited by applicant]
Extended European Search Report received for European Patent Application Serial No. 22158123.4 dated Jun. 15, 2022, 10 pages. [cited by applicant]
“Little Badger Rifle (Blued) 221r/16.5 Inches BBL”, Chiappa Firearms, 7 pages, online avilable at <https://www.thiappafirearms.com/product.php?id=181>, Known as early as Jun. 9, 2021. [cited by applicant]
Marconopolo, “870 Police Magnum-Overtolder (A.K.A. Sarah Connor Shotgun)”, Youtube, 2 pages, online avilable at <https://www.youtube.com/watch?v=T8jptYUeSNY>, Known as early as Dec. 5, 2012. [cited by applicant]
McCollum, Ian, “Forgotten Weapons: The Burgess Folding Shotgun”, 4 pages, online available at <https://www.popularmechanics.com/military/weapons/a17376/folding-shotgun/>, Known as early as Sep. 18, 2016. [cited by applicant]
McCollum, Ian, “Forgotten Weapons: The Folding Gun that was a Bit too Fancy”, 3 pages, online available at <https://www.popularmechanic,s.com/military/weapons/a17376/folding-shotgun/>, Known as early as Jun. 9, 2016. [cited by applicant]
Notice of Allowance received for U.S. Appl. No. 16/228,600 dated Jun. 14, 2019, 9 pages. [cited by applicant]
Requirement for Restriction received for U.S. Appl. No. 16/228,600 dated Mar. 21, 2019, 6 pages. [cited by applicant]
Vining, Miles, “Thumb-safety Glock”, 2 pages, online available at <https://www.forgottenweapons.com/thumb-safety-glockf/>, Known as early as Jul. 30, 2020. [cited by applicant]
Writer, Staff, “The Ares Defense FMG was a Novel, Concealable Submachine Gun Concept Developed to Protect High-Level Businessmen Overseas”, 3 pages, online available at <https://www.militaryfactory.com/smallarms/detail.… [cited by applicant]
Non-Final office action received for U.S. Appl. No. 17/578,661 dated Oct. 7, 2022, 7 pages. [cited by applicant]
Notice of Allowance received for U.S. Appl. No. 17/578,661 dated Feb. 15, 2023 9 pages. [cited by applicant]
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